Laser-induced torques in spin spirals
Freimuth F, Bluegel S, Mokrousov Y (2021)
Publication Type: Journal article
Publication year: 2021
Journal
Book Volume: 103
Article Number: 054403
Journal Issue: 5
DOI: 10.1103/PhysRevB.103.054403
Abstract
We investigate laser-induced torques in magnetically noncollinear ferromagnets with a spin-spiral magnetic structure using ab initio calculations. Since spin spirals may be used to approximate the magnetization gradients locally in domain walls and skyrmions, our method may be used to obtain the laser-induced torques in such objects from a multiscale approach. Employing the generalized Bloch theorem, we obtain the electronic structure computationally efficiently. We employ our method to assess the laser-induced torques in bcc Fe, hcp Co, and L10 FePt when a spin-spiral magnetic structure is imposed. We find that the laser-induced torques in these magnetically noncollinear systems may be orders of magnitude larger than those in the corresponding magnetically collinear systems and that they exist for both linearly and circularly polarized light. This result suggests that laser-induced torques driven by noncollinear magnetic order or by magnetic fluctuations may contribute significantly to processes in ultrafast magnetism.
Involved external institutions
Germany (DE)How to cite
APA:
Freimuth, F., Bluegel, S., & Mokrousov, Y. (2021). Laser-induced torques in spin spirals. Physical Review B, 103(5). https://doi.org/10.1103/PhysRevB.103.054403
MLA:
Freimuth, Frank, Stefan Bluegel, and Yuriy Mokrousov. "Laser-induced torques in spin spirals." Physical Review B 103.5 (2021).
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